upright=1.35|thumb|Emmy Verhey (Moscow, 1966) Emmy Verhey (born 13 March 1949, in Amsterdam) is a Dutch violinist. Biography thumb|left|Emmy Verhey in 1967 with Princess Beatrix, Prince Claus and the
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fbaf582e0fe08544df9c943bf1faf4aa9032707054fd9bc489df732aefbfb7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b33db8a3-e2a9-4627-bcaf-8b463d2f3327.json and https://artists.proofprofile.net/proofs/artist/b33db8a3-e2a9-4627-bcaf-8b463d2f3327.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98479860b3281f4295c0cf551f9326605bf4768e88016ecefca821cda310599. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332202308.
Enfantillages pittoresques: II. Berceuse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d1d2a9e294afdd3ec6aad7e60bfba9320fa5e1c884a966531d742aabe8f1de. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331011539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2272d9d32395d0d00c679c62eb87ee60a1e5040cc909efe782d727f905e60c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332202311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5d6cc89b5ee92fa75810350dfc456286b84cf4389824e266e1851f4392b640. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332001446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40696f442c879621996c05356f05cef435c4373f5d14d49951365337c4740d4f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332202316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8daaf93a1c6b961db7a7d39db77c8291a592becaad018d1b8900b533b68b8121. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332202319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5052ebb7019b7514723da2d027a443b576c1d888cce50575f653be58e509926. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332202321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48517e2a971b8f42bc78b01724fc27d9de556f4f365c9c708338a34d33221a53. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332202324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fa4ab947774e576e0c9a365d930da1b93243cfabf5a12e2508a4cf1b94599e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332202325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fc6ad69fb4ddeea57dbdc785d50ba19902f19c215e1d4268a11e3452ff1cf6. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332202335.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Violin Concerto in A Minor, BWV 1041: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be03b4764dfa77dfd36c85295f63ffd7ce847a6ebd95963b6be4d02ea191118. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331805982.
Violin Concerto in A Minor, BWV 1041: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfff5362b286d7c4629e4fe85e6afce25b394f211a9808f9a26308204453ca9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331805983.
Violin Concerto in A Minor, BWV 1041: III. Allegro (2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d5e9d32c3ba19ed5dd19feae54756869785181199a4cded18b69bf6acd6cd7. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331805984.
Violin Concerto in E Major, BWV 1042: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd45fac548024a5a35fe5d28ef10067c89d1fb6052a58dc5ffcefb2902e2b12a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331805985.
Violin Concerto in E Major, BWV 1042: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f02032f63ae9538b4155d950705da8548dd3dfc21dfa229deaad83580cb7f89. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331805986.
Violin Concerto in E Major, BWV 1042: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a6932d55ec0d1f0e9e4ada0138edb16bf465dcccaf09711e5272105e953b88. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331805987.
Violin Concerto in D Minor, BWV 1052: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db4c815fbf7d794fa03e3ba9b15f80b93547aeaf7bfa655ff4e569708176e7e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331805988.
Violin Concerto in D Minor, BWV 1052: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f592be1a3d6545537fcd1468454e3b0c826c5e34621139b4d8dc21b3c3a050. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331805989.
Violin Concerto in D Minor, BWV 1052: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f7e4f25056ff14a7f08e33b27ee5eafca314e159969edffd7eb5abba8e34b8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331805990.
Violin Concerto in G Minor, BWV 1056: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd459df2366a683018a08dc94a21284533c99c8b0785186b0ff5932306cf0c8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331805991.
Violin Concerto in G Minor, BWV 1056: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd665e06222cb44e800c48d8e0bba7cc61fd6ef3fcf089899d5ebb1ffe7620300. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331805992.
Violin Concerto in G Minor, BWV 1056: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575af73981b3a99b789a2377885a2a7bb8b86dea5d144afc380f0e1760b66504. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331805993.
Concerto for 3 Violins, Strings & B.C. In D Major, BWV 1064: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593a59e67d350867617e969290a8d7f064325f1dacf38041d84a583ec7769f1b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY330605730.
Concerto for 3 Violins, Strings & B.C. In D Major, BWV 1064: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab5ceb70792c79e1cfc613eaac46194bd8be502d641363cbfd4b4670e768527. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY330605731.
Concerto for 3 Violins, Strings & B.C. In D Major, BWV 1064: III. Allegro (2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99477f9c32dae439554910eeae81a3cff927d315713ae92aea5b0898227c945c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY330605732.
Le quattro stagioni (The Four Seasons), Op. 8 - Concerto No. 4 in F Minor, RV 297, "L'inverno" (Winter): II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcace7395630a8352977e0bf6f2f79061361edfff075174ffee9c4cc57a085a07. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL0727809.
Concerto in D Major for Violin and Orchestra, Op. 61: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03db1ab31dc54c3d55bf5ce32b396596c47dfc8fe9536062f57fe15e6e803b1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL0534602.
Violin Concerto in G Minor, BWV 1056R: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366d0c4b9229662c568bab055e8fcc53d99d245c44738412f1af69075418d573. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL0727002.
Violin Concerto No. 1 in A Minor, BWV 1041: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed6a03f300830a03d440eace83cbd7e7f75767e0e000fcb4d45e390030638b7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL0727007.
Sonata No. 5 in F Major for Violin and Piano, Op. 24, "Spring": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303a51f09a98869dd962cc0eeb918c69454505c14820adeaddf7c9ec101e61fb. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL0718401.
Sonata No. 5 in F Major for Violin and Piano, Op. 24, "Spring": II. Adagio molto espressivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96996f971fbd44d747c347c2674c7eb356f3db1b372053f29c72143abdaaae18. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL0718402.
Sonata No. 9 in A Major for Violin and Piano, Op. 47, "Kreutzer Sonata": I. Adagio sostenuto - Presto - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00f81d12e8d9b57a69c18a6d861e9f63d91c37bc3f4111a768406c6888640d2. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL0718405.